try: PHP compat test with phpcompatibility-dev

[Sidsector9]

Description of the Change

So we already have a PHP Compatibility action in place that tests for violations on PHP 8.0.

What this PR does is does the same but uses PHPCompatibility's dev branch . This is to ensure we are testing for violations with the latest changes. This is temporary until version 10.0.0 is released. Once released we can delete this and move these to the already existing PHP Compatibility action.

This action specifically runs on PHP 7.4 as recommended here.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Changelog Entry

Security - Added latest PHPCompatibility checks for PHP 8.0

Credits

Props @Sidsector9

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

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[jeffpaul]

@Sidsector9 looks like the additional tests in develop for PHPCompat pass without any changes needed here, correct?

[Sidsector9]

@jeffpaul they do, but in case the plugin has more code changes which can violate the latest rules in PHP Compat-dev, then this action will flag them, but the already existing ones won't.